Changing the pump using 178983, I believe this is Grundfos (black label). The old one I believe is Wila (white label) and had known problems. Straight away I noticed the bolt size to the casing is different, so I haven't attempted to change the "head" only. I've changed the whole casing for the new one.
Only problem is I seem to have a small leak from the small pipe going to the expansion vessel (see screengrab). This also has the pressure sensor for the analogue pressure gauge. The plastic pressure sensor holder does not want to seal into the casing, I used a new o ring from the kit. Maybe that's the problem. I was just wondering if the casings are somehow different in this regard. Different diameter inlet for the plastic pressure sensor housing?
I suppose I'll get it all off again and have a look.
Thanks in advance for any help
Only problem is I seem to have a small leak from the small pipe going to the expansion vessel (see screengrab). This also has the pressure sensor for the analogue pressure gauge. The plastic pressure sensor holder does not want to seal into the casing, I used a new o ring from the kit. Maybe that's the problem. I was just wondering if the casings are somehow different in this regard. Different diameter inlet for the plastic pressure sensor housing?
I suppose I'll get it all off again and have a look.
Thanks in advance for any help